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Title: Core-level photoabsorption characterization of diamond and carbon films

We have used synchrotron radiation core-level photoabsorption to characterize the electronic structure and morphology of carbon thin-films and determined the relative ratio of sp2 vs. sp3 bonding. The diamond, diamond-like, and carbon films characterized were prepared by a variety of methods including sputtering, CVD, microwave plasma CVD, and laser ablation. We have also measured these films using Raman spectroscopy and have found that in cases where the domain size of the crystallites in the carbon films was nanoscopic (less than 100 nm), Raman spectroscopy gave indeterminate results. In these cases, as well as with larger crystallite size films, core-level photoabsorption was able to unambiguously identify the bonding in the film. We will present photoabsorption data obtained from these materials. These experiments and prospects for other experiments that can identify the unique electronic properties and bonding of such novel thin films will be discussed.
Authors:
; ;  [1]
  1. Lawrence Livermore National Lab., CA (United States) [and others
Publication Date:
OSTI Identifier:
539097
Report Number(s):
CONF-960807--
TRN: 97:004029-0167
DOE Contract Number:
AC03-76SF00098;W-31109-ENG-38;W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 212. national meeting of the American Chemical Society (ACS), Orlando, FL (United States), 25-30 Aug 1996; Other Information: PBD: 1996; Related Information: Is Part Of 212th ACS national meeting; PB: 1830 p.
Publisher:
American Chemical Society, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON; ELECTRONIC STRUCTURE; MORPHOLOGY; DIAMONDS; RAMAN SPECTROSCOPY; SYNCHROTRON RADIATION; THIN FILMS